[BUGFIX] Synthmeat plants do not contain synthflesh

[BurntCornMuffin]

The synthmeat plant has "synthflesh" among its associated reagents.  However, the reagent is never actually put into the harvested crop, as HYPadd_harvest_reagents(...) was never being called for synthflesh, along with any other non-plant non-mushroom crops that may contain a reagent.

This patch corrects this oversight by adding all reagent_containers to the generic add_harvest_reagents branch, such that any crop that is a reagent_container whose plant is associated with a reagent will get reagents.

This bug fix does introduce a potential balance issue with synthflesh however: despite setting very low base amount settings for the reagent, hydroponics can still produce ludicrous amounts of the stuff with good growing habits, making them better than medbay for nonsurgical healing.

Changes on Github

[The Grim Sleeper]

Considering that the medbay gets blown to shit every round, and most people don't understand that No Medicine != Reason to Call Shuttle, I'd consider this more of a balance FIX.
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